It's calcium sulphate dihydrate, or 'Gypsum'.
Wall putty is preferred for interior walls as it provides a smooth finish and can be easily painted over. Plaster of Paris is more suitable for creating decorative elements, molding, or repairing small cracks on walls. The choice depends on the specific needs and requirements of the project.
Gypsum is the evaporite mineral used to make plaster and drywall due to its natural properties that make it ideal for construction purposes. When gypsum is ground into a fine powder and mixed with water, it forms a paste that can be molded into shapes or spread onto surfaces to create smooth finishes on walls and ceilings.
Before the invention of dry wall (some call it plaster board or gypsum board), walls and ceilings were slathered with plaster of Paris over lathe board (small, thin slats of wood that were nailed to the studs). This was smoothed out or in the case of some ceilings, sculpted into decorative shapes. Sometimes, crown molding was even sculpted directly on the walls with plaster. So, a plastered cieling is just that--a ceiling that has been plastered. It is a work intensive craft, and requires a high degree of skill and training to do.
If you have dry wall it would be because youwould seriously damage the paper surface behind the pain. If the wall is actually made from plaster then it is likely that this process would lead to flaking and gouges in the wall as a result of the tools used for removing the hot paint. In other words it would turn out to be a real mess.
The main mineral in drywall is gypsum, which is a soft sulfate mineral composed of calcium sulfate dehydrate. It adds strength and fire resistance to the material.
Gypsum is a soft sulfate mineral composed of calcium sulfate dihydrate. When heated, it loses water and becomes the powder used to make plaster and plaster boards. It is widely used in construction for wall and ceiling finishes due to its fire-resistant and soundproofing properties.
You can use plaster of Paris on any indoor wall, but it is rare nowadays since ready-made plasterboards are easier to use.
Gypsum is commonly used in construction as a building material. It is used to make drywall, plaster, and cement. It is also used in agriculture as a soil amendment to improve soil structure and fertility.
If you asking about plaster of Paris which is used for modling, moulds or casting a broken arm then water is all you add to the powder, if it's plaster for a wall in your house then the answer is the same water.
You will clog up your insides. i just love to eat that..plaster of paris, wall putty, slate pencil , chalk, mud, all is yummy
Plaster of Paris (but you have to work quickly...)
screed
It's made from gypsum plaster, so mixing water with calcium sulphate hemihydrate then heating it to produce plaster and using the plaster to produce the drywall.
For a scale model, plaster of Paris is very good.
Back plaster refers to a layer of plaster or mortar applied to the backside of a wall in construction. It is typically used to provide additional strength, support, or insulation to the wall. The back plaster helps to stabilize the wall structure and improve its durability.
Wall putty is preferred for interior walls as it provides a smooth finish and can be easily painted over. Plaster of Paris is more suitable for creating decorative elements, molding, or repairing small cracks on walls. The choice depends on the specific needs and requirements of the project.
plaster of paris is used to repair limbs ..and models ordinary gypsum is used both in plaster boards and in wall plasters ..board finish ..multi finish etc ...however i note one of your answers talk about lathe and plaster walls ...he got it wrong ...in traditional lathe and plaster walls the wall consisted of a wooden frame infilled with either willow or hazel twigs ...these were interwoven ..then a mix of lime sand and horse hair was applied ...the horses hair was used as to grip the twigs and give a good key ..then skimmed in sirafite ...im a builder in uk ..and work on older buildings ..ie 200-800years old